chore: complete v1.0 milestone

Archive 5 phases (36 plans) to milestones/v1.0-phases/.
Archive roadmap, requirements, and audit to milestones/.
Evolve PROJECT.md with shipped state and validated requirements.
Collapse ROADMAP.md to one-line milestone summary.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.planning/milestones/v1.0-phases/01-foundation/01-05-SUMMARY.md

@@ -0,0 +1,167 @@
+---
+phase: 01-foundation
+plan: 05
+subsystem: localization
+tags: [wpf, dotnet10, serilog, localization, resx, i18n, csharp, tdd]
+
+# Dependency graph
+requires:
+  - 01-02 (LogPanelSink, LanguageChangedMessage)
+provides:
+  - TranslationSource singleton with INotifyPropertyChanged indexer for runtime culture switching
+  - Strings.resx with 27 Phase 1 EN UI strings
+  - Strings.fr.resx with same 27 keys stubbed for Phase 5 FR translation
+  - LoggingIntegrationTests verifying Serilog rolling file sink and LogPanelSink type
+affects:
+  - 01-06 (MainWindow.xaml binds via TranslationSource.Instance[key])
+  - 01-07 (SettingsViewModel sets TranslationSource.Instance.CurrentCulture)
+  - 02-xx (all feature views use localized strings via TranslationSource)
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns:
+    - TranslationSource singleton with INotifyPropertyChanged empty-string key (signals all bindings refresh)
+    - WPF binding: Source={x:Static loc:TranslationSource.Instance}, Path=[key]
+    - ResourceManager from Strings.Designer.cs — manually maintained for dotnet build (no ResXFileCodeGenerator at build time)
+    - EmbeddedResource Update (not Include) in SDK-style project — avoids NETSDK1022 duplicate error
+    - IDisposable test teardown with TranslationSource culture reset — prevents test pollution
+
+key-files:
+  created:
+    - SharepointToolbox/Localization/TranslationSource.cs
+    - SharepointToolbox/Localization/Strings.resx
+    - SharepointToolbox/Localization/Strings.fr.resx
+    - SharepointToolbox/Localization/Strings.Designer.cs
+  modified:
+    - SharepointToolbox/SharepointToolbox.csproj
+    - SharepointToolbox/App.xaml.cs
+    - SharepointToolbox.Tests/Localization/TranslationSourceTests.cs
+    - SharepointToolbox.Tests/Integration/LoggingIntegrationTests.cs
+
+key-decisions:
+  - "Strings.Designer.cs is maintained manually — ResXFileCodeGenerator is a VS-only tool; dotnet build requires the designer file to pre-exist; only the ResourceManager accessor is needed (no per-key typed properties)"
+  - "EmbeddedResource uses Update not Include — SDK-style projects auto-include all .resx as EmbeddedResource; using Include causes NETSDK1022 duplicate error"
+  - "System.IO using added explicitly in test project — xunit test project implicit usings do not cover System.IO; consistent with existing pattern in main project"
+
+requirements-completed:
+  - FOUND-08
+  - FOUND-09
+
+# Metrics
+duration: 4min
+completed: 2026-04-02
+---
+
+# Phase 1 Plan 05: Logging Infrastructure and Dynamic Localization Summary
+
+**TranslationSource singleton + EN/FR resx + Serilog integration tests — 26 tests pass (24 Unit, 2 Integration), 0 errors, 0 warnings**
+
+## Performance
+
+- **Duration:** 4 min
+- **Started:** 2026-04-02T10:14:23Z
+- **Completed:** 2026-04-02T10:18:08Z
+- **Tasks:** 2
+- **Files modified:** 8
+
+## Accomplishments
+
+- TranslationSource singleton implements INotifyPropertyChanged; indexer `[key]` uses ResourceManager for runtime culture switching without restart
+- PropertyChanged fires with `string.Empty` PropertyName on culture change — WPF re-evaluates all bindings to TranslationSource.Instance
+- Missing key returns `[key]` placeholder — prevents NullReferenceException in WPF bindings
+- Same-culture assignment is no-op — equality check prevents spurious PropertyChanged events
+- Strings.resx: 27 Phase 1 UI strings (EN): app, toolbar, tab, button, settings, profile, status, and error keys
+- Strings.fr.resx: same 27 keys, EN values stubbed, marked `<!-- FR stub — Phase 5 -->`
+- Strings.Designer.cs: ResourceManager accessor for dotnet build compatibility (no VS ResXFileCodeGenerator dependency)
+- LoggingIntegrationTests: verifies Serilog creates a rolling log file and writes message content; verifies LogPanelSink implements ILogEventSink
+- App.xaml.cs: comment added documenting deferred LogPanelSink DI registration (plan 01-06)
+
+## Task Commits
+
+1. **Task 1 RED: Failing tests for TranslationSource** - `8a58140` (test)
+2. **Task 1 GREEN: TranslationSource + resx files implementation** - `a287ed8` (feat)
+3. **Task 2: Serilog integration tests + App.xaml.cs comment** - `1c532d1` (feat)
+
+## Files Created/Modified
+
+- `SharepointToolbox/Localization/TranslationSource.cs` — Singleton; INotifyPropertyChanged indexer; empty-string PropertyChanged; culture equality guard
+- `SharepointToolbox/Localization/Strings.resx` — 27 Phase 1 EN string resources
+- `SharepointToolbox/Localization/Strings.fr.resx` — 27 keys stubbed with EN values; Phase 5 FR completion
+- `SharepointToolbox/Localization/Strings.Designer.cs` — ResourceManager accessor; manually maintained for dotnet build
+- `SharepointToolbox/SharepointToolbox.csproj` — EmbeddedResource Update metadata for resx files
+- `SharepointToolbox/App.xaml.cs` — LogPanelSink registration comment deferred to plan 01-06
+- `SharepointToolbox.Tests/Localization/TranslationSourceTests.cs` — 6 unit tests; IDisposable teardown for culture reset
+- `SharepointToolbox.Tests/Integration/LoggingIntegrationTests.cs` — 2 integration tests; temp dir cleanup in Dispose
+
+## Decisions Made
+
+- Strings.Designer.cs maintained manually: `ResXFileCodeGenerator` is a Visual Studio design-time tool not available in `dotnet build`. The designer file only needs the `ResourceManager` property accessor — no per-key typed properties are needed since TranslationSource uses `ResourceManager.GetString(key, culture)` directly.
+- `EmbeddedResource Update` instead of `Include`: SDK-style projects implicitly include all `.resx` files as `EmbeddedResource`. Using `Include` causes `NETSDK1022` duplicate build error. `Update` sets metadata on the already-included item.
+- Explicit `System.IO` using in test file: test project implicit usings do not cover `System.IO`; consistent with the established pattern for the main project (prior decision FOUND-10).
+
+## Deviations from Plan
+
+### Auto-fixed Issues
+
+**1. [Rule 3 - Blocking] Added explicit System.IO using to LoggingIntegrationTests.cs**
+- **Found during:** Task 2 (dotnet build)
+- **Issue:** CS0103 — `Path`, `Directory`, `File` not found; test project implicit usings do not include System.IO
+- **Fix:** Added `using System.IO;` to the test file
+- **Files modified:** `SharepointToolbox.Tests/Integration/LoggingIntegrationTests.cs`
+- **Verification:** Build 0 errors, 0 warnings after fix
+- **Committed in:** 1c532d1 (Task 2 commit)
+
+**2. [Rule 3 - Blocking] Used EmbeddedResource Update (not Include) for resx metadata**
+- **Found during:** Task 1 GREEN (dotnet build)
+- **Issue:** NETSDK1022 duplicate EmbeddedResource — SDK auto-includes all .resx files; explicit Include causes duplicate error
+- **Fix:** Changed `<EmbeddedResource Include=...>` to `<EmbeddedResource Update=...>` in SharepointToolbox.csproj
+- **Files modified:** `SharepointToolbox/SharepointToolbox.csproj`
+- **Verification:** Build 0 errors, 0 warnings after fix
+- **Committed in:** a287ed8 (Task 1 commit)
+
+**3. [Rule 3 - Blocking] Created Strings.Designer.cs manually**
+- **Found during:** Task 1 GREEN (dotnet build)
+- **Issue:** `Strings` class does not exist in context — ResXFileCodeGenerator is VS-only, not run by dotnet build CLI
+- **Fix:** Created Strings.Designer.cs with ResourceManager accessor manually; only the `ResourceManager` property is needed (TranslationSource uses it directly)
+- **Files modified:** `SharepointToolbox/Localization/Strings.Designer.cs`
+- **Verification:** Build 0 errors after fix; TranslationSourceTests pass
+- **Committed in:** a287ed8 (Task 1 commit)
+
+---
+
+**Total deviations:** 3 auto-fixed (all Rule 3 — blocking build issues)
+**Impact on plan:** All fixes minor; no scope creep; no behavior change from plan intent.
+
+## Issues Encountered
+
+None beyond the auto-fixed deviations above.
+
+## User Setup Required
+
+None — no external service configuration required.
+
+## Next Phase Readiness
+
+- TranslationSource.Instance ready for WPF XAML binding in plan 01-06 (MainWindow)
+- All 27 Phase 1 UI string keys defined in EN resx
+- FR resx keyset matches EN — Phase 5 can add translations without key changes
+- Serilog rolling file sink verified working; LogPanelSink type verified ILogEventSink-compatible
+- Plan 01-06 can proceed immediately
+
+## Self-Check: PASSED
+
+- FOUND: SharepointToolbox/Localization/TranslationSource.cs
+- FOUND: SharepointToolbox/Localization/Strings.resx
+- FOUND: SharepointToolbox/Localization/Strings.fr.resx
+- FOUND: SharepointToolbox/Localization/Strings.Designer.cs
+- FOUND: SharepointToolbox.Tests/Localization/TranslationSourceTests.cs
+- FOUND: SharepointToolbox.Tests/Integration/LoggingIntegrationTests.cs
+- FOUND: .planning/phases/01-foundation/01-05-SUMMARY.md
+- Commit 8a58140: test(01-05): add failing tests for TranslationSource singleton
+- Commit a287ed8: feat(01-05): implement TranslationSource singleton + EN/FR resx files
+- Commit 1c532d1: feat(01-05): add Serilog integration tests and App.xaml.cs LogPanelSink comment
+
+---
+*Phase: 01-foundation*
+*Completed: 2026-04-02*